#include "icmp_error.h"
#include "interval.h"
#include "setting.h"
#include "statistics.h"
#include <arpa/inet.h>
#include <bits/types/struct_timeval.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>

void print_err(const char *format, ...)
{
    va_list args;

    dprintf(2, "ft_ping: ");
    va_start(args, format);
    vdprintf(2, format, args);
    va_end(args);
    write(2, "\n", 1);
}

void print_header(const struct setting *settings)
{
    printf("PING %s (%s) %zu(%zu) bytes of data",
        settings->dest.hostname,
        settings->dest.ipstr,
        settings->payload_size,
        settings->payload_size + sizeof(struct icmphdr) + sizeof(struct iphdr)
    );
    if (settings->verbose)
    {
        unsigned short pid = getpid();
        printf(", id 0x%x = %d", htons(getpid()), pid);
    }
    printf("\n");
}

void print_statistics(struct statistics const *stats, struct setting const *settings)
{
    printf("--- %s ping statistics ---\n", settings->dest.hostname);
    printf("%zu packets transmitted, %zu packets received, %.3f%% packet loss\n",
        stats->packets_sent,
        stats->packets_received,
        (double) stats->packets_received * 100 / (double) stats->packets_sent 
    );
    // TODO fix packet lost calcul
}

static const char *get_message_description(const uint8_t type, const uint8_t code)
{
    switch(type)
    {
        case 0:
            return "icmp_seq=%d ttl=%d time=%.3f ms";
        case ICMP_DEST_UNREACH:
            return (net_icmp_unreach_messages[code]);
        case ICMP_REDIRECT:
            return (net_icmp_redirect_messages[code]);
        case ICMP_TIME_EXCEEDED:
            return (net_icmp_time_messages[code]);
    }
    return (NULL);
}

void print_recv(const struct setting *settings, const struct icmphdr *header, const struct timeval *start, const struct timeval *stop, struct sockaddr_in const *sender)
{
    char *ipstr = inet_ntoa(sender->sin_addr);
    printf("%zu", settings->payload_size + sizeof(struct icmphdr) + ((header->type == 0) ? 0 : sizeof(struct iphdr)));
    printf(" bytes from %s: ", ipstr);
    printf(get_message_description(header->type, header->code),
        htons(header->un.echo.sequence),
        settings->ttl,
        get_interval(start, stop)
    );
    printf("\n");
}